Step 1: All in One Step...

Aslo take your 52mm UV filter and remove the glass. Then glue it on the front of the bodycap. The 52mm fit perfectly in the groove on the Canon bodycaps. Perfect!

Let the glue set.

Now it is time to make the hole in the piece of tin. We want the hole to be perfectly centered. I did this by making a circle of 24mm. With a compass, and cutting it out. The hole left by the compass will guide you to the center of the bodycap. Now poke your needle thru.

Put on a UV filter and your set. Mount it and take some snaps.

Note: You should paint the tin with a matte black spray or marker, for a better result.